Burner assembly for liquid fuel

ABSTRACT

A burner assembly for the combustion of liquid fuel wherein a plurality of circumferentially spaced vanes are adjustable to control whirling movement of secondary air that moves over the exterior of a regenerative tile and to an assembly that includes interceptor vanes which prevent circumferentially moving air from moving into the regenerative tile which forms a part of the burner assembly.

llnitefl States Patent [1 1 Zink et al.

1March 13, 1973 I 1 BURNER ASSEMBLY FOR LIQUID 2,284,708 6/1942 2,838,103 6/l958 3,145,670 8/l964 Copian et al. ..431/l 84 [75] Inventors: John Smith Zink; Hershel Goodnight; Robert D. Reed, all of Tulsa, Primary Examiner-Carroll B. Dority, Jr. Okla. Att0rneyClelle W. Upchurch [73] Assignee: John Zlnk Company, Tulsa, Okla. ABSTRACT [22] Wed: 1971 A burner assembly for the combustion of liquid fuel [21] A N 131,145 wherein a plurality of circumferentially spaced vanes are adjustable to control whirling movement of secondary air that moves over the exterior of a regenerative [52] US. Cl ..43l/184 tile d to an assembly that includes interceptor vanes [51] Int. Cl ..F23m 9/00 which prevent i f ti n moving f [58] Field of Search ..43 1/183, l84 ing into the regenerative tile which forms a part of the burner assembly. [56] References Cited UNITED STATES PATENTS 2 Claims, 5 Drawing Figures 2,053,003 9/1936 Koeln ..43l/l83 I I l6- 46 A /2 I; 40 5 H I, l A II a 56 57 t 2 5L 47'- 1" W40 7% H;

IJZZ'IIIIIZZ'IZ' E 1, 4/ 44 l2 N1 PATENTEDHAM 211973 Y SHEET 10F 2 F/GJ //v VE/V roR JOHN SMITH Z/NK HERSHEL GOOD/V/GHT ROBERT D. REED WQM A O/PNEY PATENTEUMAM 3197s 3,720,495

SHEET 20F 2 FIG? 48 m1 //vv/v TORS JOHN SMITH Z/NK HERSHEL GOOD/V/GHT ROBERT D. REED ATTORNEY BURNER ASSEMBLY FOR LIQUID FUEL The present invention relates to a fuel burner assembly for the combustion of liquid fuel and the invention more specifically pertains to vanes which may be adjusted to control circumferential components imparted to the secondary air which moves over the exterior of a regenerative tile within which combustion of the liquid fuel is initiated.

An object of the invention is to provide a fuel burning assembly which is adaptable for automatic operation wherein high temperatures are developed in the area immediately downstream of the atomizing mechanism for the liquid fuel and within a regenerative tile and to provide adjustable vanes which impart circumferential movement of the air moving into the furnace over the exterior of the regenerative tile and to provide interceptor vanes which convert the whirling air into radially moving air as it enters the regenerative tile to prevent the formation of coke within the regenerative tile.

Other objects and features of the invention will be appreciated and become apparent to those skilled in the art as the present disclosure proceeds and upon consideration of the accompanying drawings wherein an embodiment of the invention is disclosed.

In the drawings:

FIG. 1 is a sectional view of a burner assembly embodying the invention,

FIG. 2 is an end elevational view with portions broken away to illustrate parts of the adjusting mechanism for the vanes which control movement of the secondary air,

FIG. 3 is an elevational view of a modified tile, wit interceptor vane forming parts of the tile.

FIG. 4 is a sectional view taken on the line 4-4 of FIG. 3, and

FIG. 5 is a sectional view taken on the line 5-5 of FIG. 3.

There is shown at a portion of a furnace wall and which may form a part of a boiler structure. A burner tile 11 is mounted inan opening in the furnace wall, as shown in FIG. 1. A ring shaped member 12 assists in holding the burner tile 11 in place and forms a portion of the support for the adjustable vanes as hereinafter described. A wall 16 is spaced upstream from a furnace wall and provides a part of a housing which forms a wind box for air which has to move into the furnace through the opening 14 in the burner tile. A front plate 17 is supported on the wall 16.

A regenerative tile shown generally at 21 includes a ceramic liner 22 which is supported within a metal casing 23 attached to a front plate 24 by any suitable means which in turn is secured to the plate 17 in any suitable manner. The regenerative tile 21 has a disc shaped portion 25 equipped with a central opening 29. The upstream end portion of the casing23 is provided with a plurality of circumferentially spaced openings 36. A nozzle and a suitable atomizing mechanism 32 extends through the opening 29 to develop droplets of the liquid within the regenerative tile.

A plurality of circumferentially spaced shafts 41 are mounted for rotation in bearings carried by the ring 12 and a wall portion 40. The shafts 41 extend through the wall portion 40 at the upstream end of the burner assembly. A vane 44 is mounted oneach shaft so as to turn therewith. In one rotated position of all of the shafts 41 the vanes 44 overlap each other as shownin FIG. 2. A sprocket wheel 46 is mounted on the outer end of each shaft 41. A sprocket chain 47 trained about all of these sprocket wheels is maintained in a taunt condition by an idler sprocket 48 (FIG. 2). The sprocket chain and the sprocket wheels are encased in an annular housing 51 carried by the front wall portion 40. An extension 52 carried by one of the shafts 41 extends outside of the annular housing. A control lever 53 mounted on the shaft extension 52 serves to rotate the associated shaft 41 and move the sprocket chain 47 to rotate all of the vanes 44 in unison.

In operation the rotated position of the vanes 44 controls the circumferential component imparted to the air which moves over the exterior of the regenerative tile 21 and through the opening 14 in the burner tile 11. The openings 36 admit air for movement into the interior of the regenerative tile 21. The interceptor vanes 56 and the cover 57 prevent any circumferential movement of air as created by the vanes 44 from moving into the interior of the regenerative tile through the openings 36. Thus the air moving over in the exterior of the atomizing assembly 32 does not develop coke on the interior of the regenerative tile 21 and the liquid fuel burns and attains a relatively high temperature before it escapes from the downstream end of the regenerative tile.

A modified regenerative tile 21a is shown in FIGS. 3 and 4 and it is provided with interceptor vanes 66 which may be mounted in circumferentially spaced relationship adjacent the openings 36 in the casing 23 for the regenerative tile. The vanes 66 will serve to cause any circumferentially moving air to move in directions radially of the axis of the regenerative tile and this air will then move in an axial direction through the opening 29. Thus whirling air is avoided in the regenerative tile and the development of coke on the surfaces within the regenerative tile is also avoided.

While the invention has been described with reference to a particular organization of elements making up a fuel burner assembly it will be appreciated that changes may be made in the general organization as well as alterations in the various elements. Such modifi cations and others may be made without departing from the spirit and the scope of the invention as set forth in the appended claims.

What is claimed and desired to be secured by Letters Patent is:

1. A burner assembly for the combustion of a liquid fuel comprising a burner tile having an opening therethrough, a casing supported with a downstream open end disposed within said opening and with the major portion thereof upstream of the burner tile, a ceramic liner adjacent said open end, means for atomizing a liquid fuel within said ceramic liner downstream of the open end, means comprising an annular opening for admission of air about said casing and circumferentially spaced overlapping vanes adapted to be rotated to open and close the opening, the last said means communicating with circumferentially spaced openings in the casing for admission of air into the casing adjacent its upstream end and with the opening through the burner tile, and means disposed in the openings in the casing for preventing air having circumin the burner tile.

2. The burner assembly of claim 1 wherein said means disposed in the openings in the casing are radially disposed interceptor vanes carried by the casing. 

1. A burner assembly for the combustion of a liquid fuel comprising a burner tile having an opening therethrough, a casing supported with a downstream open end disposed within said opening and with the major portion thereof upstream of the burner tile, a ceramic liner adjacent said open end, means for atomizing a liquid fuel within said ceramic liner downstream of the open end, means comprising an annular opening for admission of air about said casing and circumferentially spaced overlapping vanes adapted to be rotated to open and close the opening, the last said means communicating with circumferentially spaced openings in the casing for admission of air into the casing adjacent its upstream end and with the opening through the burner tile, and means disposed in the openings in the casing for preventing air having circumferential movement imparted thereto by said vanes from entering the upstream end of the casing, whereby the atomized fuel is ignited while within the confines of the said ceramic liner and while protected thereby from circumferential movement of air through the opening in the burner tile.
 1. A burner assembly for the combustion of a liquid fuel comprising a burner tile having an opening therethrough, a casing supported with a downstream open end disposed within said opening and with the major portion thereof upstream of the burner tile, a ceramic liner adjacent said open end, means for atomizing a liquid fuel within said ceramic liner downstream of the open end, means comprising an annular opening for admission of air about said casing and circumferentially spaced overlapping vanes adapted to be rotated to open and close the opening, the last said means communicating with circumferentially spaced openings in the casing for admission of air into the casing adjacent its upstream end and with the opening through the burner tile, and means disposed in the openings in the casing for preventing air having circumferential movement imparted thereto by said vanes from entering the upstream end of the casing, whereby the atomized fuel is ignited while within the confines of the said ceramic liner and while protected thereby from circumferential movement of air through the opening in the burner tile. 